Finding the Fourth Proportional to 278,058.09, 416,837.44 and 128,221.86
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Solution
The fourth proportional to 278,058.09, 416,837.44 and 128,221.86 is: 192,217.65
Step by Step Solution
- Step 1: Write the proportion equation
278,058.09 : 416,837.44 = 128,221.86 : x - Step 2: Convert to fraction form
278,058.09/416,837.44 = 128,221.86/x - Step 3: Cross multiply
278,058.09x = 416,837.44 × 128,221.86 - Step 4: Simplify right side
278,058.09x = 53,447,671,874.44 - Step 5: Solve for x
x = 53,447,671,874.44/278,058.09 - Step 6: Final answer
x = 192,217.65
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.